Cooling arrangement for high frequency apparatus



Aug. @23, 1932.

H. z`oDTNl-:R` 1,873,804

COOLING ,ARRANGEMENT FOR HIGH FREQUENCY APPARATUS PORCELANA/E OE 4-711THE/VVVA/QE @LOCK `Filed Jan. 7, 1931" COOL/NG JACKET l Patented Aug. .23, 1932 UNITED STATES PATENT OFFICE HEINRICH ZODTNER, F BERLIN-:BIR-KENWEIRIDERQI GERMANY, ASSIGNOB TO C. LORENZ AKTIENGESELLSCHAFT, BERLIN-TEMPELHOF, GERMANY COOLING ARRANGEMENT FOB HIGH FREQUENCY .APRABATUS Application led January 7,1931, Serial No. 507,190, and in Germany January 8, 1930.

'This hose had to be of suicient length that the column of the cooling medium offered s ulicient attenuation to the high frequency voltage for the ends ofthe tube at which the cooling medium kwas introduced and diss charged to be atl ground potential. The use of india rubber hose lis unsatisfactory for several reasons. kAfter a short period of opf eration the hose becomes brittle, particularly close to the anodeof the tube, requiring frequent replacements. Furthermore, the hose is liable toy develop leaks, particularly in that portion close tothe tube which becomes brittle. Since witha high frequency apparatusA the circuit impdances must be close to the tube, this is a particular inconvenience as it is liable to cause damage to these circuit elements. 80 In the drawing,

` Fig. 1 is an elevation of a thermionic tube having a cooling jacket, with the device of thed invention connectedto the cooling jacket, an 35 Fig. 2 is a cross-section of the device of the invention shown in Fig. 1.

In Fig. 1 a thermionic tube with a cooling jacket is vshown connected to a body portion B made of earthenware, porcelain or similar material, in which a duct is cut for the water or other cooling medium 1n such a manner that the body portion or block proper forms J the walls ofthe duct for the passage of the coolin medium. The duct D can be ar- 4 range as shown in Fig. 2 or it may be helical.

An advantage of the arran ement shown in Fig. 2 is economy in manu acturing. In

the duct is then cut in each block. Prior to the burning, the two halves are ressed together and burnt in this position. upply and discharge ducts may be cut in the same block, if desired.- It is particularly advanta eous -to use porcelain or earthenware for the lock a shorter duct may be used. Furthermore,

with a duct of smaller cross-sectional area there will be less distributed capacity to earth along its path.

What is claimed is: 1. A device for cooling thermionic tubes comprising a block of porcelain or earthen-v ware, ducts cut in said block, said ducts hav'- ing a glazed surface. e,

2.`A device for cooling thermionic tubes comprising a block formed by uniting two pieces of porcelain or earthenware, a glazed duct in said block, a half of said duct being formed in each of said pieces.

3. The method of manufacturing a device ducts therem, which comprises cuttin sai block into two pieces, cuttin half o said duct in each portion of said lock, and reuniting the two pieces. I

In testimony whereofA I aflix my s1 ature. HEINRICH ZOD'I ER.

the manufacture of such a device a block is ,I

Y 5 rst prepared which is cut in two. Half of for cooling thermionic tubes consisting of v a block of porcelain or earthenware having 

